Improving efficiency of the active-clamped SEPIC rectifier at high line frequencies

Author

Athalye, Praneet ; Maksimovic, Dragan ; Erickson, Robert

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO

Volume

2

fYear

2005

fDate

6-10 March 2005

Firstpage

1152

Abstract

The performance of a conventional isolated SEPIC rectifier can be improved with an active voltage clamp. Relatively high efficiency and low total harmonic distortion (THD) can be achieved with an active-clamped SEPIC rectifier in high-line-frequency (360-800 Hz) avionics applications. However, it is observed that a diode conduction problem affects the rectifier efficiency as the line frequency increases. This paper explains the diode conduction problem and presents a solution that is based on a variation of the same topology. An efficiency of 90% has been achieved for a power level of 100 W over the entire line frequency range. Additionally, the solution offers the possibility of high-voltage bulk energy storage

Keywords

avionics; diodes; energy storage; harmonic distortion; power factor correction; rectifying circuits; 100 W; 360 to 800 Hz; THD; active voltage clamp; active-clamped SEPIC rectifier; avionics; diode conduction; high line frequencies; high-voltage bulk energy storage; rectifier efficiency; total harmonic distortion; Aerospace electronics; Clamps; Diodes; Energy storage; Frequency; Power electronics; Rectifiers; Switches; Topology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE

Conference_Location

Austin, TX

Print_ISBN

0-7803-8975-1

Type

conf

DOI

10.1109/APEC.2005.1453143

Filename

1453143